Mr. Endre Repasi Profile

Endre Repasi

Researcher at Fraunhofer IOSB

SPIE Involvement:

Author

Publications (28)

Proceedings Article | 14 May 2020 Presentation + Paper

Imager assessment by classification of geometric primitives

D. Wegner, E. Repasi

Proceedings Volume 11406, 1140608 (2020) https://doi.org/10.1117/12.2558572

KEYWORDS: Cameras, Data modeling, Image classification, Imaging systems, Image quality, Infrared imaging, Projection systems, Motion models, Mid-IR

Read Abstract +

Proceedings Article | 9 October 2019 Paper

ECOMOS software structure and key features

E. Repasi, S. Keßler, P. Bijl, R. J. M. ten Hove, L. Labarre, D. Wegner, W. Wittenstein, H. Buersing

Proceedings Volume 11159, 111590K (2019) https://doi.org/10.1117/12.2536425

KEYWORDS: Performance modeling, Data modeling, Instrument modeling, Visual process modeling, Computer simulations, Imaging systems, Infrared imaging, Thermography, Thermal modeling, Atmospheric modeling

Read Abstract +

Proceedings Article | 11 June 2018 Paper

An overview of joint activities on computational imaging and compressive sensing systems by NATO SET-232

Todd Du Bosq, Sanjeev Agarwal, Judith Dijk, Alper Gungor, H. Emre Guven, Terence Haran, Martin Laurenzis, Kevin Leonard, Abhijit Mahalanobis, Gabriela Paunescu, Jonathan Piper, Endre Repasi, Yunlong Sheng

Proceedings Volume 10669, 106690H (2018) https://doi.org/10.1117/12.2307852

KEYWORDS: Imaging systems, Sensors, Computational imaging, Image resolution, Image compression, Compressed sensing, Cameras, Spatial resolution, Multiplexing, Computing systems

Read Abstract +

Proceedings Article | 26 April 2018 Presentation + Paper

Optronic System Imaging Simulator (OSIS): imager simulation tool of the ECOMOS project

D. Wegner, E. Repasi

Proceedings Volume 10625, 106250M (2018) https://doi.org/10.1117/12.2304386

KEYWORDS: Sensors, Imaging systems, Image sensors, Cameras, Digital signal processing, Image processing, Optical transfer functions, Electro optical modeling, Optoelectronics, Computer simulations

Read Abstract +

Proceedings Article | 26 April 2018 Paper

Imaging simulation of active EO-camera

José Pérez, Endre Repasi

Proceedings Volume 10625, 106250I (2018) https://doi.org/10.1117/12.2304365

KEYWORDS: Turbulence, Atmospheric propagation, Cameras, Imaging systems, Sensors, Atmospheric modeling, Wave propagation, Optical simulations, Beam propagation method, Computer simulations

Read Abstract +

Proceedings Article | 6 October 2017 Paper

The European computer model for optronic system performance prediction (ECOMOS)

Stefan Keßler, Piet Bijl, Luc Labarre, Endre Repasi, Wolfgang Wittenstein, Helge Bürsing

Proceedings Volume 10433, 1043312 (2017) https://doi.org/10.1117/12.2279820

KEYWORDS: Imaging systems, Systems modeling, Sensors, Atmospheric modeling, Performance modeling, Electro optical modeling, Target acquisition, Cameras, Signal processing

Read Abstract +

Proceedings Article | 22 May 2017 Presentation + Paper

Workbench for the computer simulation of underwater gated viewing systems

K. Braesicke, D. Wegner, E. Repasi

Proceedings Volume 10186, 101860B (2017) https://doi.org/10.1117/12.2262415

KEYWORDS: Image sensors, Scattering, Modulation transfer functions, Pulsed laser operation, Reflectivity, Cameras, Computer simulations, Imaging systems, Computing systems, Sensors, Water, Systems modeling, Image enhancement, Device simulation, Optical simulations

Read Abstract +

Proceedings Article | 3 May 2017 Paper

Noise-insensitive no-reference image blur estimation by convolutional neural networks

D. Wegner, M. Koerber, E. Repasi

Proceedings Volume 10178, 101780G (2017) https://doi.org/10.1117/12.2268080

KEYWORDS: Neural networks, Digital image processing, Image processing, Data modeling, Motion estimation, Image analysis, Image quality, Digital cameras, Thermography, Image sensors, Databases, Distortion, RGB color model, Convolutional neural networks, Motion models, Image filtering

Read Abstract +

Proceedings Article | 3 May 2017 Paper

The European computer model for optronic system performance prediction (ECOMOS)

Endre Repasi, Piet Bijl, Luc Labarre, Wolfgang Wittenstein, Helge Bürsing

Proceedings Volume 10178, 101780O (2017) https://doi.org/10.1117/12.2262590

KEYWORDS: Imaging systems, Systems modeling, Sensors, Atmospheric modeling, Performance modeling, Target acquisition, Thermal modeling, Thermography, Electro optical modeling, Signal processing

Read Abstract +

Proceedings Article | 3 May 2016 Paper

Simulation of whitecaps and their radiometric properties in the SWIR

Frédéric Schwenger, Endre Repasi

Proceedings Volume 9820, 982014 (2016) https://doi.org/10.1117/12.2223025

KEYWORDS: Computer simulations, Short wave infrared radiation, Bidirectional reflectance transmission function, Light sources, Optical simulations, Light, Reflection, 3D modeling, Cameras, Statistical modeling, Reflectivity, Sensors, Receivers

Read Abstract +

A 3D simulation of the dynamic sea surface populated with whitecaps is presented. The simulation considers the dynamic evolution of whitecaps depending on wind speed and fetch. It is suitable for imaging simulations of maritime scenarios. The calculation of whitecap radiance is done in the SWIR spectral band by considering wave hiding and shadowing, especially occurring at low viewing angles. Our computer simulation combines the 3D simulation of a maritime scene (open sea/clear sky) considering whitecaps with the simulation of light from a light source (e.g. laser light) reflected at the sea surface. The basic sea surface geometry is modeled by a composition of smooth wind driven gravity waves. The whitecap generation is deduced from the vertical acceleration of the sea surface, i.e. from the second moment of the wave power density spectrum. To predict the view of a camera, the sea surface radiance must be calculated for the specific waveband with the emitted sea surface radiance and the specularly reflected sky radiance as components. The radiances of light specularly reflected at the windroughened sea surface without whitecaps are modeled by considering an analytical statistical sea surface BRDF (bidirectional reflectance distribution function). A specific BRDF of whitecaps is used by taking into account their shadowing function. The simulation model is suitable for the pre-calculation of the reflected radiance of a light source for near horizontal incident angles where slope-shadowing of waves has to be considered. The whitecap coverage is determined from the simulated image sequences for different wind speeds and is compared with whitecap coverage functions from literature. A SWIR-image of the water surface of a lake populated with whitecaps is compared with the corresponding simulated image. Additionally, the impact of whitecaps on the radiation balance for a bistatic configuration of light source and receiver is calculated for different wind speeds.

Proceedings Article | 3 May 2016 Paper

Image based performance analysis of thermal imagers

D. Wegner, E. Repasi

Proceedings Volume 9820, 982016 (2016) https://doi.org/10.1117/12.2223629

KEYWORDS: Cameras, Sensors, Image processing, Image enhancement, Image sensors, Thermography, Projection systems, Image quality, Modulation transfer functions, Detection and tracking algorithms

Read Abstract +

Proceedings Article | 16 October 2015 Paper

Passive and active EO sensing of small surface vessels

Ove Steinvall, Folke Berglund, Lars Allard, Johan Öhgren, Håkan Larsson, Elias Amselem, Frank Gustafsson, Endre Repasi, Peter Lutzmann, Benjamin Göhler, Marcus Hammer, Kennedy McEwen, Ken McEwan

Proceedings Volume 9649, 96490I (2015) https://doi.org/10.1117/12.2195320

KEYWORDS: Sensors, Cameras, Mid-IR, Visibility, Short wave infrared radiation, Profiling, Infrared cameras, Target detection, Imaging systems, Clouds

Read Abstract +

Proceedings Article | 19 May 2015 Paper

The influence of the choice of the oceanic phase function on imaging under water

K. Braesicke, E. Repasi

Proceedings Volume 9459, 94590G (2015) https://doi.org/10.1117/12.2176331

KEYWORDS: Computer simulations, Monte Carlo methods, Phase measurement, Sensors, Software development, Imaging systems, Receivers, Pulsed laser operation, Remote sensing, Scattering

Read Abstract +

Proceedings Article | 12 May 2015 Paper

A TRM4 component for the Night Vision Integrated Performance Model (NV-IPM)

Brian Teaney, Joseph Reynolds, Todd Du Bosq, Endre Repasi

Proceedings Volume 9452, 94520H (2015) https://doi.org/10.1117/12.2180002

KEYWORDS: Signal to noise ratio, Systems modeling, Imaging systems, Modulation transfer functions, Performance modeling, Cameras, Visual process modeling, Phase shift keying, Modulation, Eye

Read Abstract +

Proceedings Article | 12 May 2015 Paper

Detector integration time dependent atmospheric turbulence imaging simulation

Todd Du Bosq, Endre Repasi

Proceedings Volume 9452, 94520B (2015) https://doi.org/10.1117/12.2176985

KEYWORDS: Turbulence, Sensors, Modulation transfer functions, Atmospheric turbulence, Imaging systems, Data modeling, Computer simulations, Distortion, Image quality, Image processing

Read Abstract +

Proceedings Article | 15 October 2013 Paper

Measurements and analysis of active/passive multispectral imaging

Christina Grönwall, Dominique Hamoir, Ove Steinvall, Håkan Larsson, Elias Amselem, Peter Lutzmann, Endre Repasi, Benjamin Göhler, Stéphane Barbé, Olivier Vaudelin, Michel Fracès, Bernard Tanguy, Emmanuelle Thouin

Proceedings Volume 8897, 889705 (2013) https://doi.org/10.1117/12.2028647

KEYWORDS: Sensors, Near infrared, Reflectivity, Short wave infrared radiation, Multispectral imaging, Turbulence, Long wavelength infrared, Transmission electron microscopy, Visualization, Target recognition

Read Abstract +

Proceedings Article | 5 June 2013 Paper

Simulation of laser beam reflection at the sea surface modeling and validation

Frédéric Schwenger, Endre Repasi

Proceedings Volume 8706, 87060S (2013) https://doi.org/10.1117/12.2015767

KEYWORDS: Optical simulations, Cameras, Reflection, Laser sources, Computer simulations, Video, Bidirectional reflectance transmission function, Receivers, Atmospheric modeling, Sensors

Read Abstract +

Proceedings Article | 6 October 2011 Paper

Results of ACTIM: an EDA study on spectral laser imaging

Dominique Hamoir, Laurent Hespel, Philippe Déliot, Yannick Boucher, Ove Steinvall, Jörgen Ahlberg, Hakan Larsson, Dietmar Letalick, Peter Lutzmann, Endre Repasi, Gunnar Ritt

Proceedings Volume 8186, 81860M (2011) https://doi.org/10.1117/12.903672

KEYWORDS: Sensors, Signal to noise ratio, Laser imaging, LIDAR, Reflectivity, Imaging systems, Target detection, Interference (communication), Polarization, 3D modeling

Read Abstract +

Proceedings Article | 10 May 2011 Paper

Simulation of laser beam reflection at the sea surface

Frédéric Schwenger, Endre Repasi

Proceedings Volume 8014, 80140R (2011) https://doi.org/10.1117/12.883387

KEYWORDS: Sensors, Laser sources, Optical simulations, Short wave infrared radiation, Reflection, Bidirectional reflectance transmission function, Receivers, Pulsed laser operation, Computer simulations, Atmospheric modeling

Read Abstract +

Proceedings Article | 10 May 2011 Paper

Computer simulation of image degradations by atmospheric turbulence for horizontal views

Endre Repasi, Robert Weiss

Proceedings Volume 8014, 80140U (2011) https://doi.org/10.1117/12.883805

KEYWORDS: Turbulence, Computer simulations, Image quality, Reflectivity, Image processing, Atmospheric turbulence, Cameras, Atmospheric propagation, Sensors, Atmospheric modeling

Read Abstract +

Proceedings Article | 9 October 2010 Paper

ACTIM: an EDA initiated study on spectral active imaging

O. Steinvall, I. Renhorn, J. Ahlberg, H. Larsson, D. Letalick, E. Repasi, P. Lutzmann, G. Anstett, D. Hamoir, L. Hespel, Y. Boucher

Proceedings Volume 7835, 78350C (2010) https://doi.org/10.1117/12.865041

KEYWORDS: Imaging systems, LIDAR, Sensors, Target detection, Imaging spectroscopy, Reflectivity, Hyperspectral imaging, 3D acquisition, Polarization, Semiconductor lasers

Read Abstract +

Proceedings Article | 2 October 2008 Paper

Mono- and bi-static SWIR range-gated imaging experiments for ground applications

Endre Repasi, Peter Lutzmann, Ove Steinvall, Magnus Elmqvist

Proceedings Volume 7114, 71140D (2008) https://doi.org/10.1117/12.799816

KEYWORDS: Cameras, Imaging systems, Thermography, Long wavelength infrared, Mid-IR, Short wave infrared radiation, Signal attenuation, Infrared imaging, Sensors, Gated imaging

Read Abstract +

Proceedings Article | 11 April 2008 Paper

Analysis of image distortions by atmospheric turbulence and computer simulation of turbulence effects

Endre Repasi, Robert Weiss

Proceedings Volume 6941, 69410S (2008) https://doi.org/10.1117/12.775600

KEYWORDS: Turbulence, Computer simulations, Image analysis, Sensors, Image filtering, Atmospheric turbulence, Cameras, Statistical analysis, Imaging systems, Image processing

Read Abstract +

Proceedings Article | 11 April 2008 Paper

Perception range prediction for IR pilot sight

A. Robert Weiss, Peter Großmann, Endre Repasi, Gunnar Ritt, Wolfgang Wittenstein

Proceedings Volume 6941, 69410T (2008) https://doi.org/10.1117/12.777273

KEYWORDS: Temperature metrology, Data modeling, Infrared cameras, Sensors, Atmospheric modeling, Signal attenuation, Visibility, Visualization, Infrared sensors, Thermal modeling

Read Abstract +

Proceedings Article | 4 May 2006 Paper

Sea surface simulation in the infrared modeling and validation

Frédéric Schwenger, Endre Repasi

Proceedings Volume 6239, 62390J (2006) https://doi.org/10.1117/12.664838

KEYWORDS: Clouds, Thermography, Sensors, Long wavelength infrared, Mid-IR, Sun, Infrared imaging, Cameras, Computer simulations, Thermal modeling

Read Abstract +

Proceedings Article | 12 May 2005 Paper

IRISIM: infrared imaging simulator

Rami Guissin, Eitan Lavi, Alex Palatnik, Yuval Gronau, Endre Repasi, Wolfgang Wittenstein, Raanan Gal, Michael Ben-Ezra

Proceedings Volume 5784, (2005) https://doi.org/10.1117/12.606524

KEYWORDS: Imaging systems, Sensors, Eye models, Image processing, Minimum resolvable temperature difference, Electro optical modeling, Infrared imaging, Optical simulations, Thermal modeling, Electrons

Read Abstract +

Proceedings Article | 5 September 2003 Paper

Sea surface simulation for testing of multiband imaging sensors

Frederic Schwenger, Endre Repasi

Proceedings Volume 5075, (2003) https://doi.org/10.1117/12.488472

KEYWORDS: Sensors, Visible radiation, Computer simulations, Water, Polarization, Reflectivity, Dielectric polarization, Infrared imaging, Sun, Reflection

Read Abstract +

Proceedings Article | 26 October 1998 Paper

Generation of dynamic IR scenes for ground-based systems and missile applications

Endre Repasi, Hans-Juergen Greif

Proceedings Volume 3436, (1998) https://doi.org/10.1117/12.328044

KEYWORDS: Cameras, Image segmentation, Missiles, Thermography, Data modeling, Thermal modeling, Image analysis, Computer simulations, Device simulation, Image resolution

Read Abstract +